problem with network mapping with discover

I am unable to map a network drive with Vista. When I follow all the directions, i get a network error 'windows cannot access http://192.168.1.167:8888 check the spelling of the name.....etc.... under details it says 'error code:0x80070043 the network name cannot be found'.

of note, i set this up just fine on my girlfriend's computer which is using XP. also, while i was waiting for discovers most recent version which fixed the white screen problem, i used files lite for a few days. i was able to set up that network without any problems and it worked fine. i have since deleted that network and want to create one for discover....but have not been able to because of the problems in the above paragraph.

thanks for any help.