[Serusers] serweb: problem on writing to /tmp/ser_fifo

Hello SER experts,

I installed SER v0.9.0 and serweb, last CVS version. I unpacked serweb under <web_root> directory and all the directory tree to have the `apache:apache' priveligies. However, when I try to login, I get a warning:

Warning: fopen(/tmp/ser_fifo): failed to open stream: Permission denied in /var/www/html/zhrodague.net/public_html/serweb/html/functions.php on line 267

I look at the /tmp/ser_fifo and surprised that it has the root:root priveligies, although I run ser with the options "-u ser -g ser" (the 'ser' user has just been added just for this purpose).

So, what have I do to get the write permissions on the ser_fifo? Have I definitely to add `ser' and/or `apache' user to the `root' group?

Thanks.