Undefinded Index on Mysql Result under Win98/PWS

I am using PHP4 + MySQL + PWS + Windows 98. We are trying to port over a web site to a laptop for remote use. However, when we execute a SQL query on a DB in which a filed of the record contains a NULL value, we get an error. The code is as follows: $GetQuery = mysql_query ("SELECT * FROM ApplicantsTbl WHERE App_ID = $qq"); $AppResult = mysql_fetch_array ($GetQuery); $AppDOB = $AppResult[AppDOB]; The query executes just fine, and PARTS of the $AppResult array get returned. However... We are experiencing TWO problems: First, unless we put quote marks around the index so it reads $AppResult['AppDOB'], we get an undefined constant. This doesn't happen on our Linux/Apache web server. Second, if the field AppDOB contains a NULL value, PHP barks that there is an undefined index. It appears that it won't even create the index. I would appreciate any help you could be. Greg