Validating UsernameToken FAILED problem

Hello.

I met problem when trying to call my custom function  via webservice.

Here is log from wsf_php_server.log

[Tue May 13 11:16:16 2008] [debug] engine.c(660) Invoking phase PreDispatch
[Tue May 13 11:16:16 2008] [debug] phase.c(200) Invoke the handler RampartInHandler within the phase PreDispatch
[Tue May 13 11:16:16 2008] [info]  [rampart][shp] Processing security header in Strict layout
[Tue May 13 11:16:16 2008] [info]  [rampart][shp] Processing security header element UsernameToken
[Tue May 13 11:16:16 2008] [info]  [rampart][shp] Validating UsernameToken
[Tue May 13 11:16:16 2008] [debug] rampart_sec_processed_result.c(42) [rampart][spr] Set SPR_UT_nonce in Security Processed Results of message context
[Tue May 13 11:16:16 2008] [debug] rampart_sec_processed_result.c(42) [rampart][spr] Set SPR_UT_created in Security Processed Results of message context
[Tue May 13 11:16:16 2008] [debug] rampart_sec_processed_result.c(42) [rampart][spr] Set SPR_UT_username in Security Processed Results of message context
[Tue May 13 11:16:16 2008] [error] rampart_username_token.c(546) [rampart][rampart_usernametoken] Cannot get the password for user HnN6LW4uThf9YqbA
[Tue May 13 11:16:16 2008] [error] rampart_sec_header_processor.c(525) [rampart][shp] Validating UsernameToken FAILED
[Tue May 13 11:16:16 2008] [error] rampart_sec_header_processor.c(1704) [rampart][shp] UsernameToken processing failed
[Tue May 13 11:16:16 2008] [error] rampart_in_handler.c(144) [rampart][rampart_in_handler] Security Header processing failed.
 

Can someone help me with this or tell in what direction should i look?

thanx in advance.