Installing and upgrading help

Hi, i,m trying to instaal moodle 1.5. k. I.m unable to finisch the install.php prcedure. All pathnames seems not valid. See also my screendumps from the hostingserver ( http://www.heemgaardwebklas.org/images/f1.gif )

jrgkeyjv is the login name delivered by the hosting company. I do not recognize this error.....Don't know what to do.

Groet van Teus