wordpress 2.8 manual upgrade failure

After manually replacing the files of latest wordpress version and pointing my site to site/wp-admin/upgrade.php I was greeted with following message:
“One or more database tables are unavailable. The database may need to be repaired.”
On clicking ‘repaired’ I get following error:

wmu_posts: Table ‘wpmu_test.wmu_posts’ doesn’t exist
wmu_comments: Table ‘wpmu_test.wmu_comments’ doesn’t exist
wmu_links: Table ‘wpmu_test.wmu_links’ doesn’t exist
wmu_options: Table ‘wpmu_test.wmu_options’ doesn’t exist
wmu_postmeta: Table ‘wpmu_test.wmu_postmeta’ doesn’t exist
wmu_terms: Table ‘wpmu_test.wmu_terms’ doesn’t exist
wmu_term_taxonomy: Table ‘wpmu_test.wmu_term_taxonomy’ doesn’t exist
wmu_term_relationships: Table ‘wpmu_test.wmu_term_relationships’ doesn’t exist
wmu_commentmeta: Table ‘wpmu_test.wmu_commentmeta’ doesn’t exist

Can anyone look into this please?