HELP: Can't create/write to file

(Note: I also posted this to the Sourceforge support forum, but you've
all said the mailing list gets read more often.)

Everything was working fine with my PhpWiki installation. But today I
installed phpMyAdmin so I could look at the MySQL tables more easily,
and after I got that working, the wiki no longer loads. Instead, I get
this error:

<begin error>

Fatal PhpWiki Error

lib/WikiDB/backend/PearDB.php:779: Fatal[256]: wikidb_backend_mysql:
fatal database error

    * DB Error: unknown error
    * (SELECT linkee.id as id, linkee.pagename as pagename,
linkee.hits as hits, linkee.pagedata as pagedata FROM link, page AS
linker, page AS linkee WHERE linkfrom=linker.id AND linkto=linkee.id
AND linker.pagename='HomePage' ORDER BY linkee.pagename [nativecode=1
** Can't create/write to file '/root/tmp/#sql_f5b_0.MYI' (Errcode:
13)])
    *


Warning: Unknown(): A session is active. You cannot change the session
module's ini settings at this time. in Unknown on line 0

</end error>

I'm not very familiar with sql, so any hints on where to start looking
for the cause of this would be greatly appreciated!


-- 
AA


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