My controls are missing their Viewstats..

Hey friends, 

 I have a real confusing problem.My controls are missing their Viewstats.. when my page make a postback..

 At the begning at call my website default.asp and popolate my controls dropdownlist, label....and so on..

In ths page i call mye page again whith  paramer : default.aspx?page=0   - Here iss miss my contros viewstate..

Are my controls missing viewstats becouse default.aspx and default.asp?page=0 are 2 DIFFRENT pages ?

 

 

 

 

 
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