The answer is in the error message:
when i upload image than show this message:-
System.Web.HttpException was unhandled by user code
ErrorCode=-2147467259
Message="'~/Temp/C:\Documents and Settings\Administrator\My Documents\Downloads\AGENT DIPLOMATIC CARD.jpg' is not a valid virtual path."
Source="System.Web"
at ASP.hr_registration_scom_aspx.__RenderContent1(HtmlTextWriter __w, Control parameterContainer) in D:\SCOM\hrmanagement\hr\Registration_Scom.aspx:line 57
You are assembling the file name wrongly:
~/Temp/C:\Documents and Settings\
Is not a valid path.
Look at the lines immediately before line 57 of Registration_Scom.aspx and it should be obvious.