phpmyadmin convert myisam to innodb

Hey, so I have recently become aware that in order to do foreign key relationships, I need to convert my tables over to innodb. I was wanting to do this in phpmyadmin and开发者_开发百科 found the option for 'storage engine (type)' However my dropdown of options is limited to: MyISAM, MEMORY, and MRG_MYISAM

Would anyone be able to explain why this is?

apache 2.0 
phpmyadmin 3.3.10 
mysql 5.0.67
php 5.2.2

Thanks!

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InnoDB support has to be enabled on the instance of MySQL you're using.

Try issuing a SHOW ENGINES SQL command to see what's available.