Subject IBO 4 Eval Problems (?)

I'm trying to compile a Dephi package with IBO 4 and I'm receiving
the follow error:

[Fatal Error] users_basic_v18.dpk(46): Unit IB_Components was
compiled with a different version of IB_Constants.IB_VERSION_MAJOR

I downloaded the IBO 4 Kit and the Delphi 5 DCUs from the IBO site

Is there something I'm missing?

Thanks in advance.

Jackson Gomes
Tools&Comps - Security Components for Delphi, C++ Builder and Kylix.
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