Why is the  "Use Native Sequencing" option disabled ?

I am trying Toplink with SQL Server and I have some identity fields... I see in the documentation that I should select the "Use Native Sequencing" option in the mapping properties(Database Info tab) but it is disabled(I use JDeveloper Is there any reason for this ?
Thanks in advance.

Native sequencing should be configurable for the SQL Server platform. I have filed a bug to track this.
The easiest workaround is to select a different database platform (i.e. Oracle) and then enable native sequencing. You should then set it back to SQL Server. In my quick test it kept the native sequencing configuration even though it shows as disabled.

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