force close on android grid view scroll down

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Mobile

Android

Gridview

Hi guys

I have a gridview with 4 columns and some rows and i retrieve some data from web service and load it correctly in gridview adapter,the gridview shows the data but when a start to scroll down after a little bit of scrolling it force closes and i dont have any idea whats the problem?

here is what logcat logged:

dalvik.system.nativestart.main