Has anybody used the regexlib web service. I plan to use it in my .net winform application and am quite clueless abt it. I have written the fllowing code (c#) by trial and error

            com.regexlib.Webservices regexService = new com.regexlib.Webservices();
            System.Data.DataSet set=regexService.listRegExp("email", "", 1, 10);
            grid.DataSource = set.Tables[0];
            grid.Refresh();

. It does return a dataset, but when i try to run this query again, SOAPException occurs saying "Server was unable to process request. ---> DataTable already belongs to another DataSet."

What to do in this case. Googling for it, i found a solution where someone invoked .copy() on a table before adding it to a dataset. ut i believe ths is being done at regexlib end, so is the regexlib web service buggy?