pre-remove script not working

[nis]

Hi guys,

I had a prerm script which basicaly had 2 remove some directories b4 removing the package.
#pre-remove script : Remove Intermediate files created by Mentys without user's Knowledge
echo "in pre-remove"
am -r /opt/nis/System

am -r /opt/nis/Demos

It gave me following error, n now it is not allowing me to instal the package again...
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
: invalid option
dpkg: error processing mentys1.deb (--install):
subprocess new pre-removal script returned error exit status 1
: invalid option
dpkg: error while cleaning up:

i m using debian packaging for the first time n dunno what exactly i shuld write in prerm script to get it working back.....
Any help wuld highly b appreciated....
I m not able to move further from here...m struck...

Thanks,
nis

[Jeroen]

Can you please spellcheck your post? It's hugely annoying to read it like this, and I myself am not inclined to reply when I'll need to get out of my way to actually understand what's written here.