i install symbian belle
i create a program,when i build it ,the ide repot error

the error is:
Can't locate E32env.pm in @INC (@INC contains: C:\Nokia\devices\Nokia_Symbian_Belle_SDK_v0.6\epoc32\tools\ C:/Perl/lib C:/Perl/site/lib .) at C:\Nokia\devices\Nokia_Symbian_Belle_SDK_v0.6\epoc32\tools/bldmake.pl line 37.
BEGIN failed--compilation aborted at C:\Nokia\devices\Nokia_Symbian_Belle_SDK_v0.6\epoc32\tools/bldmake.pl line 37.