As of ActiveState build 822, the AS repo only has version 0.17 of IO-All, not the current 0.38. This causes exactly the problem reported by the OP.

I hacked around this by installing 0.17 via ppm, then downloading 0.38 from CPAN and copying the files on top of the 0.17 files in my perl installation. Cursory testing (running the "Tiny Web Server" example) indicates that it Just Works. I also copied the three .pm files from the IO-All-LWP distribution into my site\lib\IO\All, and that too Just Works. Pure Perl++. :-)