You don't have to be dbo (database owner) to have that EXECUTE permission to stored procedure.
By doing the following steps:
1) Log in to your remote database using SSMS or SQL Sever Management
Studio (Start -> All Programs -> Microsoft SQL 2005
-> SQL Sever Management Studio)
2)Open a new query windows
3) Type this in the query window then hit F5 key to execute the script (replace username with your real username, it your username contains a period, for example
[email protected] then put it in a bracket like this [
[email protected]]
GRANT EXEC TO username
GO
or this script
GRANT EXEC TO [username]
GO