The PHP manual (version 5.2) says:
int odbc_fetch_into ( resource $result_id , array &$result_array [, int $rownumber ] )
Are your parameters out of order? Note that the order of the parameters changed in PHP version 4.2.0. If your PHP is newer than that (and it probably is) then the old parameter order won't work. Your code may be copied from something older.
Cheers,
Peter
If this solves your problem, accept it. Vote anyway.