>> First, ensure you have installed msvc8 run-time libraries
>>
>> Regards,
>> Vlad
>>
>
> I have installed MS Visual C++ CRT 9.0
>
> is that correct???

Only if 8 == 9

> But the server was fully functional last week, on wednesday I have
> installed SPIII, on Sunday I tried to connect to FB2.1 and it did not
> work, no other changes on my system.

Maybe SP3 uninstalled your copy of msvc8 run-time. Is it so hard
to reinstall it again and see what happens ?

Regards,
Vlad