Checking if your kit is complete...
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Writing Makefile for CAD::ProEngineer
cp ProEngineer.pm blib/lib/CAD/ProEngineer.pm
AutoSplitting blib/lib/CAD/ProEngineer.pm (blib/lib/auto/CAD/ProEngineer)
cp interp.pl blib/lib/CAD/interp.pl
/export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap ProEngineer.xs > ProEngineer.xsc && mv ProEngineer.xsc ProEngineer.c
gcc -c -Iprotk23-2002180/protoolkit/includes   -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"0.02\" -DXS_VERSION=\"0.02\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE -DPRO_MACHINE=19 -DSOLARIS   ProEngineer.c
ProEngineer.xs:15: ProToolkit.h: No such file or directory
ProEngineer.xs:16: ProUtil.h: No such file or directory
ProEngineer.xs:17: ProMenu.h: No such file or directory
ProEngineer.xs:18: ProMenuBar.h: No such file or directory
ProEngineer.xs:19: ProUICmd.h: No such file or directory
ProEngineer.xs:20: ProParameter.h: No such file or directory
ProEngineer.xs:21: ProDimension.h: No such file or directory
make: *** [ProEngineer.o] Error 1