Matrix form display problem

Hi

I have a matrix form for school time table.
In this the source table is period table and the matrix table is day table.I want to get subject details from another table called subject master.when i click the menu item 'get subject', the subject details will be displayed in each cell.my problem is instead of different subject it shows same subject in all cells.but the coding is working properly and it shows different subject in the message box.

Please guide me how to display different subject in each cell.i have tried using array also.

Thanks & Regards
navshare