Program works only when there are records :-(

Hi, I have a select statment with a UNION so that i am getting 5 COUNT(*)'s from a table. After that I have this code: ***************************** $res = mysql_query($tt); $num_rows = mysql_num_rows($res); //This is line 25 $x=1; for($i=0; $i<5; $i++) { $a = mysql_result($res, $i); //This is line 30 $bb[$x]=$a; $x++; } $one = $bb[1]; $two = $bb[2]; $thr = $bb[3]; $fou = $bb[4]; $fiv = $bb[5]; $tot=$one + $two + $thr + $fou + $fiv; ***************************** When i have some records in the database this works fine and i get all the values in $one,$two etc but when a new account is created and i the COUNT(*) gets back just 0 I get these ugly errors/warnings on my page: Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /usr163/home/b/e/bestweb/public_html/co.details.php on line 25 Warning: mysql_result(): supplied argument is not a valid MySQL result resource in /usr163/home/b/e/bestweb/public_html/co.details.php on line 30 Warning: mysql_result(): supplied argument is not a valid MySQL result resource in /usr163/home/b/e/bestweb/public_html/co.details.php on line 30 Warning: mysql_result(): supplied argument is not a valid MySQL result resource in /usr163/home/b/e/bestweb/public_html/co.details.php on line 30 Warning: mysql_result(): supplied argument is not a valid MySQL result resource in /usr163/home/b/e/bestweb/public_html/co.details.php on line 30 Warning: mysql_result(): supplied argument is not a valid MySQL result resource in /usr163/home/b/e/bestweb/public_html/co.details.php on line 30 What should i do and wheres the problem? I searched on google but just found some sites outputting this, no real help. Totally confused, please help. Thanks, -Ryan