Poll with SSI gives errors on my server

I just downloaded the excellent looking Advanced Poll 2.02 and everything looks fantastic, except the SSI inclusion.

I've seen your working demo of the SSI implementaion, but the demo file on my server simply gives [an error occurred while processing this directive].

I'm using a full Apache Virtual Server running on Linux, PHP version 4.1.2.

Is there a server setting or something I need to use to allow PHP to be included with SSI?

it is not possible to parse php within an SSI call

you can only call it with an include statement within a php file

If that's the case, what's this... http://proxy2.de/poll/demo_5.shtml ?

Does anyone know how to set a server up to use php with ssi in this way? BTW, I don't have root access.

Thanks in advance.