Pre-fix tables almost there ..

Hi!

Have run into a problem (blocks do not save on sub-domain) when pre-fixing tables.

Attached are 2 screenshots to show:

Prefix block tables are correctly configured on sub-domain
Block tables exist correctly in phpmyadmin as main_domain_3_blocks etc

Table 'lilifilm.domain_3_blocks'; doesn't exist query: SELECT DISTINCT b.* FROM domain_3_blocks b LEFT JOIN domain_3_blocks_roles r ON b.module = r.module AND b.delta = r.delta WHERE b.theme = endless_news; AND b.status = 1 AND (r.rid IN (2,6) OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module in /home/public_html/modules/block/block.module on line 460.

So what I'm seeing is that the prefix of 'lilifilm.domain_3_blocks' should be 'lilifilm.domain_3_blocks

Please would you be so kind to point me in the right direction.

Note: Single signon also installed, but don't think that is related