Wap stack error WSL_OS_THREAD_1 Kern-exec 3

[VEIKKO99]

I am developing application that uses wap-stack for communication. Evereything works ok, but sometimes i get strange function from wap-stack.

Something weird happens in phone software and i get folling error message:
WSL_OS_THREAD_1
Kern-Exec 3

Transaction never finish after this error.
Do you know how can I avoid this problem?

thanks in advance.