the problem was'nt in Sourcetree or Askpass, error raised when askpass try to use one of .dll file that worked with intel graphics(in my case intel 3000 hd).
for fixing I download intel graphic driver from intel(https://downloadcenter.intel.com/default.aspx) site and run then restart.
There was 'sourcetree.log' but there wasn't 'askpass.log' !!!
in sourcetree.log :
2013-07-16T14:03:18: Could not determine repository from: 'http://firstname.lastname@example.org/yyyyy/yyyyy.git', output was:
fatal: repository 'http://email@example.com/yyyyy/yyyyy.git' not found
abort: HTTP Error 404: Not Found
2013-07-16T14:05:04: Could not determine repository from: 'http://firstname.lastname@example.org/yyyyy/yyyyy.git', output was:
It looks like your repository URL is incorrect. Make sure you're using the one from your Bitbucket page as shown below:
You can select either the SSH or HTTP url based on the drop down to the right of the screen on your repository page.
Just make sure you use that exact copy of the URL. If it's still not working we can go from there.
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