hope someone can help me...

i have a site with different sql statements. all rulez clear, but when i want save i call a sql statement, who should save some xml news.
but then comes a error message:

Warning: Illegal offset type in /usr/local/lib/php/DB/mssql.php on line 361

and he dont know anymore the fetchrow function:
Fatal error: Call to undefined function: fetchrow()

when i save without save any xml news, all rules cool..
i work with pear, sql server and php.
can anyone help me?