trouble installing mchat on phpBB3 forum

I got my phpBB board up and running fine. I went and tried to install the mchat mod using the instructions found in the XML file. I coped and changed all of the files and uploaded everything successfully. Except when I go to my page (the main url redirects to “domain.com/phpBB3”) I get this error:

Fatal error: Call to undefined function mchat_cache() in /home/****/public_html/phpBB3/mchat.php on line 64

When I go to my board configuration page (domain.com/phpBB3/adm/) I get this error:

Fatal error: Call to undefined function mchat_cache() in /home/***/public_html/phpBB3/includes/functions.php on line 4553

I looked at the code for these, and both are

[php]mchat_cache ();[/php]

I dug around a bit, and found that the file that has the cache is “functions_mchat.php” which is totally blank. I don’t know if that has anything to do with it.

As you can likely tell, I’m a bit of a noob. I hope this is something easy that someone with more experience can help with. Thanks

Well, there is a LOT of discussions on the web about this error. Most are in german, so I could not read most. But, several mentioned version numbers of several items…

First, are you running this on localhost or online?
Which version of PHP?
Which version of phpBB3 (not sure if that matters)
and is the chat a recent version as some of the older versions have fixes needed…

Next, the error codes you gave indicated that you may have not included all of the files you need to include.
Check your includes first.

Doubt this helps much, but, some things to look at to start…