Problem when I refresh a web-I report

Hi EvErYbOdY,

I have a small problem with BO.

I have created a report in Deski and export it in Webi. This report find the information on the SQL Server database and I have no problem when I want to update it on Deski.

On Webi, i have this error :

http://img402.imageshack.us/img402/5602/webierrorym5.png

translation : Connection or SQL sentenc error: (DA0005): Exception: DBD, ORA-12154: TNS:could no resolve service name State: N/A. The following data provider have not been successfully refreshed

Do you know how I can solve this problem ?

ThAnK yOu