Application Error:NumberFormatException

[rajeshyadav mobi]

Hi,
This is Rajesh Developed a Application in J2me where the user can send msg on scheduled time

Here the Scheduled time which is stored in string format should be converted into integer format
to compare with current system time.
so the problem is that in some phones its working like(Nokia 3110c) and in other like (Nokia c5 ) its throwing an error.

Please Help me how to slove the problem.
Thanks in Advance

[Madhan Sundararajan Devaki]

Please add code snippet(s) for easy assistance.