FreeTDS and MSServer Instance - linux

Question

I've been using FreeTDS to connect to a Microsoft SQL Server for some time now and it's been working well with the following configuration:
[mydb]
host = 192.168.0.21
port = 1434
database = master
tds version = 8.0
# tsql -S mydb -U user -P password -D master
locale is "en_GB.UTF-8"
locale charset is "UTF-8"
using default charset "UTF-8"
Default database being set to master
1> select ##version
2> go
Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (Intel X86)
Dec 28 2012 19:06:41
Copyright (c) Microsoft Corporation
Express Edition on Windows NT 6.2 <X64> (Build 9200: ) (WOW64)
(1 row affected)
1> exit
Since my production MS Server has multiple instances, I now have to connect to the database using instance instead of port. I tried this with the following configuration:
[mydb]
host = 192.168.0.21
instance = MYINSTANCE
database = master
tds version = 8.0
But I keep getting the following error:
# tsql -S mydb -U user -P password -D master
locale is "en_GB.UTF-8"
locale charset is "UTF-8"
using default charset "UTF-8"
Default database being set to master
16There was a problem connecting to the server
I did a strace on the command and got the following messages:
# strace -S mydb -U user -P password -D master
...
ioctl(3, FIONBIO, [1]) = 0
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
1) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
2) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
3) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
4) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
5) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
6) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
7) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
8) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
9) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
10) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
11) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
12) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
13) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
14) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
15) = 0 (Timeout)s=POLLIN}], 1, 1000
sendto(3, "\4MYDB\0", 6, 0, {sa_family=AF_INET, sin_port=htons(1434), sin_addr=inet_addr("192.168.0.21")}, 16) = 6
16) = 0 (Timeout)s=POLLIN}], 1, 1000
close(3) = 0
brk(0x11ee000) = 0x11ee000
brk(0x11d6000) = 0x11d6000
write(2, "There was a problem connecting t"..., 45There was a problem connecting to the server
) = 45
exit_group(1) = ?
Does anyone know what could be happening? Any help would be appreciated.
Thanks for your time.