Hopefully it is a simple case and you can help me 
I have three recordsets: 
first  has 12 values from January to December   
second: recordset has 5 values from August to December 
third has values only for May and July. 
All of them are in the same year. 
I do a Multi Series Chart to have three diferent lines but at the chart these lines start from the same point which is January!!!!! 
So the first records set has a line from January to December which is correct. 
Second  line start from Janury to May which is totaly wrong 
and third  line start from January to March which also wrong! 
How does it come?!! How can I make this working? HELP 
Is there any special Category option? 
What Should I do to have the same data on the chart as in database? 
Thanks in advance! 
(PHP, Mysql)  
Urbanson