Stuck on Step 4

[iadventure]

I get this error when trying to go past step 4:

We're sorry, but we encountered an error during the installation process...

Unable to create/write to http://jk-adventure.com/JKA/photopost701/data! Check your data directory permissions before continuing.

When you have fixed your permissions Refresh this page to try again.

If you have corrected the error, you may hit GO BACK and try again.

[Chuck S]

You would need to set permissions to 777 on the data and uploads directories per the install instructions however I see from other threads your already past this issue but here are the install instructions anyway

PhotoPost PHP Photo Sharing Photo Gallery Installation Guide