@tomleslie 

Thanks alot.........

@Rouben Rostamian  thankyou so much it worked!!!

@Rouben Rostamian  

thanks a lot but there is one more issue the aminattion part is not working and i use maple 15 . is there any other way to animate the results

thanks

@Rouben Rostamian  

This is the syntax i have used to solve the pde but im getting an error saying that,

Error, (in pdsolve/numeric/process_PDEs) number of dependent variables and number of PDE must be the same

please help!!!!!