SMF 1.1 RC2 to RC3 upgrade package not valid/corrupted

[guppy]

SMF Version: SMF 1.1 RC2
Hi,

I'm trying to upgrade from RC2 to RC3 but I get this error:

The package you tried to upload either is not a valid package or has become corrupted.

I tried upgrade and update zip and tar.gz but none worked

Just to be sure, I tried to upload another mod and that uploaded fine.

[J. Williams]

If you are trying to upgrade via package manager thats impossible

You must upgrade via the FTP method

[guppy]

LOL sorry.. Haven't upgraded a beta for a long time O.o"

Thank you