Tuxedo - OSITP transaction timeout

Hi All,

We are having the following setup:

ALSB  Tuxedo Business Service ----> Tuxedo Service---->UNISYS.

Tuxedo service connects to UNISYS through OSITP, while ALSB communicates with
Tuxedo through WTC. A blocking timeout is specified for the WTC local acces
point. So whenever a request exceeds the blocking timeout, a timeout error is
returned to the client of ALSB. But the request is getting updated at the
database at UNISYS. 

I can confirm the following:

1. ALSB is not propagating its transaction to Tuxedo.
2. Tried with setting TRANTIME="X" and AUTOTRAN=y for unisys remote
service at Tuxedo, but still it wasn't working

Is there a way to prevent the update at UNISYS side when timeout's occur?

Please let me know if this can achieved using configuration changes alone

TIA