SQL 6.5 and D3 TStoredProc problem

I have a project under under D2 using SQL 6.5 through ODBC.
After transferring this project to D3 in all of my TStoredProc objects
appears same bug: all string returning parameters trunctes to 1 char.

Does anybody have the same problem.
Thank for any suggestions.

WBW Egor A. Shokurov
P.S. My project works properly under Delphi2 with BDE4.0