Activity Plan Creation from web service fails to set the template flag to P

Hi,

We are trying to create activity plan (& related activities) from web service passing a template id. All the records are getting created in siebel database, but the plan record gets created with template flag = N instead of the value P.

We tried to force an update on the record using many business layer alternatives (script, workflow steps, etc...) but it looks like it is impossible to update the flag from siebel business layer when we invoke this from a web service. We are using a clone of activity plan bc that uses a regular cssbuscomp class (in fact we even tried the special activity plan class without any success).