Can't restore to 5.0.1 (not eligible for requested build)

i'm trying clean restore 5.0.1, , keep getting device isn't eligible requested build (no error numbers) every time set in dfu mode. phone has 5.0.1, , hosts file clean (without apple.com line).

there else preventing me being able restore version of ios?

 

what device have shsh blobs

 

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