configure: error: Berkeley DB version mismatch on OpenLDAP

[Alexandre Martins Garcia <alexmgarcia%az.netcabo.pt@localhost>]

I'm trying to compile evolution-data-server, when it goes compile 
openldap in configure gives that:

Before configure it says:

===> Required installed package db4>=4.4.16: db4-4.4.20 found

and when it starts the configure, at the end says:

checking db.h usability... yes
checking db.h presence... yes
checking for db.h... yes
checking for Berkeley DB link (default)... no
checking for Berkeley DB link (-ldb43)... no
checking for Berkeley DB link (-ldb-43)... no
checking for Berkeley DB link (-ldb-4.3)... no
checking for Berkeley DB link (-ldb-4-3)... no
checking for Berkeley DB link (-ldb42)... no
checking for Berkeley DB link (-ldb-42)... no
checking for Berkeley DB link (-ldb-4.2)... yes
checking for Berkeley DB version match... Berkeley DB version mismatch
       header: Sleepycat Software: Berkeley DB 4.4.20: (January 10, 2006)
       library: Sleepycat Software: Berkeley DB 4.2.52: (December  3, 2003)
no
configure: error: Berkeley DB version mismatch


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root@dagobah:/usr/pkgsrc/databases/openldap# pkg_info|grep db
db4-4.4.20          Berkeley DB version 4 from Sleepycat Software

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What is the problem? I only have installed version 4.4.20 of DB4.