Plz help my sandisk 4GB pendrive dosen't work

actually when i plug in my pendrive then it shows sandisk micro cruzer but after that it dosen't show any thing . it need to show in my computer but no thing to display
but if i plug in another pendrives or memorycards then it works but just this pendrive doesn't works
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please help me to put out this problem
please mail me if u can help me friends
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Sandeep Nepali
sandeep_bestboy@hotmail.com
Pokhara Nepal
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