UB does not see flash files

When I manualy download flash files from UB download and choose phone and version of firmware in USB FLASHING, UB says files dont exsist. Sometimes it sees one or two files and not rest of them. All files are present on hard disk in right folder. I have win7 32. I tried reinstaling UB software (new wersion 3.0), but problem stays. Can u, please, help.

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