This is written in CGI:IRC's FAQ:
The main frame depends on your server supporting nph (non-header parsed) CGI scripts and streams. Apache is known to support these in the default configuration, but modules such as mod_gzip and some CGI wrappers stop streams working. Cobalt RAQs are also known to have this problem (see below). Also some web-proxies don't support streams (Novell Border manager is the only example currently).
Is that right as for Polarhost? Or I'm installing the script in the wrong way?