DHCP errors after installing SQL server 2005

Hi,
After installing SQL SERVER 2005 on Windows 2003 SP1 the DHCP server fails
to start. I ve searched the google and other sites in the net but didn't
find anything usefull.
The error code tis 20013.

In the event viewer I get these messages (errors):
tcpsvcs (2548) Corruption was detected during soft recovery in logfile
C:\WINDOWS\System32\dhcp\j50.log. The failing checksum record is located at
position END. Data not matching the log-file fill pattern first appeared in
sector 1680 (0x00000690). This logfile has been damaged and is unusable.

tcpsvcs (2548) Corruption was detected during soft recovery in logfile
C:\WINDOWS\System32\dhcp\j50.log. The failing checksum record is located at
position END. Data not matching the log-file fill pattern first appeared in
sector 1680 (0x00000690). This logfile has been damaged and is unusable.

tcpsvcs (2548) Database C:\WINDOWS\System32\dhcp\dhcp.mdb requires logfiles
1448-1449 in order to recover successfully. Recovery could only locate
logfiles starting at 1450.

tcpsvcs (2548) Database recovery/restore failed with unexpected error -543.

tcpsvcs (2548) Restore: Corruption was detected while restoring from backup
logfile C:\WINDOWS\System32\dhcp\backup\new\j50005A9.log. The failing
checksum record is located at position END. Data not matching the log-file
fill pattern first appeared in sector 1765 (0x000006E5). This logfile has
been damaged and is unusable.


Anybody to help???

--
Thomas Dais