make-kpkg clean error

["J. Zidar" <zee@email.si>]

I have to recompile my kernel because I will be moving my hdd to antoher 
machine that uses a different chipset but when I issue the "make'kpkg clean" 
(as root) command, I get the following error:
kompi:/usr/src/linux# make-kpkg clean
Permission denied.
Permission denied.
Permission denied.
Permission denied.
Use of uninitialized value in pattern match (m//) at
        /usr/share/kernel-package/kpkg-vercheck line 76 (#1)
    (W uninitialized) An undefined value was used as if it were already
    defined.  It was interpreted as a "" or a 0, but maybe it was a mistake.
    To suppress this warning assign a defined value to your variables.

    To help you figure out what was undefined, perl tells you what operation
    you used the undefined value in.  Note, however, that perl optimizes your
    program and the operation displayed in the warning may not necessarily
    appear literally in your program.  For example, "that $foo" is
    usually optimized into "that " . $foo, and the warning will refer to
    the concatenation (.) operator, even though there is no . in your
    program.

Use of uninitialized value in pattern match (m//) at
        /usr/share/kernel-package/kpkg-vercheck line 108 (#1)
Use of uninitialized value in pattern match (m//) at
        /usr/share/kernel-package/kpkg-vercheck line 152 (#1)
Use of uninitialized value in concatenation (.) or string at
        /usr/share/kernel-package/kpkg-vercheck line 164 (#1)
Problems ecountered with the version number .
The upstream version fails to match ^[A-Za-z0-9\.\+\-]+$ . . . 

Any idea?

Thanks,
Jernej Zidar