repeating DB errors

[yvonne100]

using smf 1.1.5, MySQL version 5.0.45.\
After a myisamchk -r *.MYI I will have these errors returned, looking for weeks now to solve this problem, please help

[root@server]# myisamchk -s *.MYI
myisamchk: MyISAM file smf_boards.MYI
myisamchk: error: Key 5 doesn't point at same records that key 1
myisamchk: error: Keypointers and record positions doesn't match
MyISAM-table 'smf_boards.MYI' is corrupted
Fix it using switch "-r" or "-o"
myisamchk: MyISAM file smf_log_karma.MYI
myisamchk: error: Key in wrong position at page 3487744
myisamchk: error: Keypointers and record positions doesn't match
MyISAM-table 'smf_log_karma.MYI' is corrupted
Fix it using switch "-r" or "-o"
myisamchk: MyISAM file smf_log_search_words.MYI
myisamchk: error: Key in wrong position at page 8472576
MyISAM-table 'form_log_search_words.MYI' is corrupted
Fix it using switch "-r" or "-o"
myisamchk: MyISAM file smf_messages.MYI
myisamchk: error: Found duplicated key at page 33542144
myisamchk: error: Keypointers and record positions doesn't match
MyISAM-table 'smf_messages.MYI' is corrupted
Fix it using switch "-r" or "-o"

Thanks ( in Dutch is your answer welcome too )

Best regards,

yvonne100