Horde inaccessible after upgrade to 7.5.3

[kyomedia]

Following upgrade;

http://webmail.domain.com just shows default plesk page, where previous was Horde (and its not becasue webmail is no-longer defined in DNS.)

http://webmail.domain.com/horde shows Not Found
The requested URL /horde was not found on this server.

Running: psa v7.5.3_build75050527.09 os_FreeBSD 4.9
OS FreeBSD 4.9-RELEASE-p12

Welcome any advice.

 

[kevin@]

search the forums for the solution

is isnt hard to find