Not a valid DEB package error

[Mugurel Tudor <mugurelu@go.ro>]

Hi,

I created some DEB packages, and everything is OK with one exception:
for every package that I created, at instalation time, I get the
following error (on Debian Stable and also on Debian Unstable):

# apt-get install foo
Reading Package Lists... Done
Building Dependency Tree... Done
The following NEW packages will be installed:
  foo 
0 packages upgraded, 1 newly installed, 0 to remove and 0  not upgraded.
Need to get 2449kB of archives. After unpacking 3121kB will be used.
Get:1 http://mtudor-l.aa.local pool/ foo 1.1.3-4 [2449kB]
Fetched 2449kB in 0s (10.5MB/s)  
E: /var/cache/apt/archives/foo_1.1.3-4_i386.deb not a valid DEB package.
Selecting previously deselected package avira-core.
(Reading database ... 23434 files and directories currently installed.)
Unpacking avira-core (from .../foo_1.1.3-4_i386.deb) ...
Setting up foo (1.1.3-4) ...

I am refering to the "/var/cache/apt/archives/foo_1.1.3-4_i386.deb not a
valid DEB package." error. Any idea why is this happening?

Thanks in advance.
-- 
Mugurel Tudor (mugurelu@go.ro)
Linux Registered User: 212231
---------------------------------------------------------
In God we Trust. All others must have valid md5 checksums.