$sth = $dbh->prepare("
			Update tUser
			Set ? = ? 
			Where UserId = $user_info{UserId}
			");

	foreach $key(keys %user_info)
		{
		if ($key ne "UserId")
			{
			$sth->execute($key, $user_info{$key});
			}
		}
	$sth->finish();

##</code><code>##

DBD::mysql::st execute failed: You have an error in your SQL syntax near ''LastName' = 'Smith'
                        Where UserId = 1
                        ' at line 2 at /usr/usr_update line 197.