Getting Members to Upgrade Membership

So I decided to add a paid membership level.  

I'm hoping to charge a small fee for a membership level that will allow posting in blogs and forums.  

I'm hoping that this will eliminate all the hundreds of thousands of spam posts I'm getting everyday.

However, now if a regular member tries to post a blog or forum it says "Access Denied".

I want it to direct the member to upgrade his/her membership.  Otherwise, they will likely not know why they are being denied access.  Nor will they know where to go to upgrade their membership.

Is there a way to do this?

edit the Access Denied lang string and replace it with this:

<script language="javascript"> 

setTimeout('location.href="http://example.com"',10000); 

</script>You are redirected.

10000 = 10 sec

Change the text in orange or red. oh! what is it?

Good luck

Awesome!  Thanks!!!

Where exactly do I go to edit this language?  In Admin>Settings>Lanuage Settings ???

edit the "_Access denied" lang key and put this code inside it.

Awesome!  Thanks!!

I have one more question:

I'm not really sure how the payment module works.  If someone purchases an upgrade in membership, and they pay through paypal, does their membership upgrade automatically or do I have to upgrade it manually?  If it upgrades automatically, how can I see that they have in fact been upgraded.