Another query engine error

Hi.

I have an error to go mad. My vb.net application makes a report that runs fine in my local machine (with vs2003 and SQL Express 2005). My problem occurs when I execute this using an external database (SQL-Server 2000). Then my app returns the error "Query engine error: "c:....".
The actually data origin for report is a dataset, and I've compared the two datasets filled with each databases, and the content and structure for both is the same.

I don't know what more to look. Any suggestion is well come.

Thanks is advance.