Trouble starting Concrete5

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Running Mamp on Powerbook G4 running 10.4.1.1

I recently set up MAMP, and then added Concrete5. When I get to the install Concrete page, and click install I get the following message;

"Unable to connect to database"
All the check marks are green, except
Version Comparison Available where the is an question mark, and an exclamation point with the following message

"You must chmod 755 concrete/libraries/3rdparty/htmldiff.py and disable PHP safe mode."

I have gone to the identified file htmldiff.py info box and changed privileges to “everyone”. And I have opened the php.ini file, and the safe mode is "off".

However, when I try to install concrete I still get the same error message.

On the “Install Concrete” window I have the following information in the “Server” field:

http://localhost:8888/concrete/concrete5.3.1.1/...



Do you have suggestions of what I can do to correct this problem?

 
swaan replied on at Permalink Reply
I have the exact same problem/error with my host, including test results.

However I can't CHMOD, so I used hosts tool to add all available rights to everyone.

they suggest that I should write "localhost" as DB server but I get the same error message.
What can I do? Is there something specific I could ask my host to check?