Using Demo Template

Hi, I tried installing one of the demo templates, but received a message that I needed to increase my WP Memory Limit to 64MB, the PHP Time Limit to at least 400 seconds, and the
PHP Max Input Time to at least 300 seconds.

I contacted technical support from my web host and they made the necessary changes, but my System Diagnostics in my WordPress Dashboard are still saying I need to make the changes.

Any help is appreciated.

Thank you,

Nigel