Clustered Primary Key

Hello!
How can I create a clustered primary key?
This alter table statement get the following error:
ALTER TABLE test ADD CONSTRAINT
PK_Table_1 Primary Key CLUSTERED
(
[Field 1],
[Field 2]
)
The constraint specified is not valid.

Thank you
SaschaThe CLUSTERED keyword is not supported by SQL Compact Edition. If you drop it, the statement should run OK.