missing header files on debian

[Slava]

I tried to install  Apache::Request  both   way:  manualy and
using  perl -MCPAN -e shell.   It does't work  on Debian.
it tries to find  some   header files  from apache. The same with
libapreq-0.31
I installed  apache  and mod_perl  as debian package(DSO).
Any body knows how to  solve this?
Thanks.