backup problem plesk 7.5.3

[thaidreamhost]

i use plesk for window 7.5.3 and i careate backup fiel upload
to my local computer i create name ( panainik)
and when i upload back to server it show message

" D:?program file /.../panalnik is not a valid plesk domain backup file "

and can't upload back to restore .
how can i do? and what i do wrong?
thank you

 

[Mr.Incredible]

Plesk backup files have .psa, .psa1, psa2 .. etc. extensions.

 

[thaidreamhost]

i try to change from panainik to panainik.psa1
and try to upload to server . it's still the same.
help me please.
thank