Open Image ?

Hello

I'm trying to open a "screen shot" with ext ".jpg"
File manager works good.

I tried This with no result, can anybody help ?

Dim iIntent As Intent
iIntent.Initialize(iIntent.ACTION_VIEW, File.DirRootExternal, "PF_Pic.jpg", False)
iIntent.SetType("image/jpeg")
StartActivity(iIntent)

ERROR = android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:///mnt/sdcard/PF_Pic.jpg typ=Image/jpeg flg=0x20000 }