I have chatter enabled and running so I assume I'm running the Summer 2010 release, but when I try to create a Set of SObjects I get the error "Set of SObject: Account not allowed."

I used the example code from the salesforce_summer10_release_notes.pdf on page 115:

Account a1 = new Account(name='MyAccount');

Set<Account> accountSet = new Set<Account>{a1};

I did upgrade the Eclipse IDE but I'm guessing I'm not actually using the latest release because when I try to create a new Apex class I can only select version 16.

Thanks in advance for any help.

I have chatter enabled and running so I assume I'm running the Summer 2010 release, but when I try to create a Set of SObjects I get the error "Set of SObject: Account not allowed."

I used the example code from the salesforce_summer10_release_notes.pdf on page 115:

Account a1 = new Account(name='MyAccount');

Set<Account> accountSet = new Set<Account>{a1};

I did upgrade the Eclipse IDE but I'm guessing I'm not actually using the latest release because when I try to create a new Apex class I can only select version 16.

Thanks in advance for any help.