sybperl and perl ithreads

Hi,

Has anybody experienced problems while using perl threads with sybperl?

I was trying to write a sybping program. We have about 200 servers.
The program takes about 45 seconds to check all the servers.

I thought that maybe I could reduce the time by using threads in perl.

When I use threads, the program returns errors.
These have to do with the parameters in the callback routines being
undefined.

Thanks for your help in advance.

Best regards,
Ashish