projection ?

[Eric Den BREEJEN]

Hello,
Some time ago I digitized some vector-data (roads, rivers) from a French I.G.N 
(institut geographique national)-map using MAP-INFO. I saved my data as a 
DXF-file. Afterwards I imported this file in GRASS and made a vector-map of 
it. Everything seemed alright, but but when I used this map as an overlay over 
my elevation-map the river appeared to be at the top of a mountain instead of 
in the valley. My vectordata are not only moved but also transformed. I guess 
my problem has something to do with projections. I digitized my vectors in 
lat-lon degrees.decimal. (longitudes refer to the international meredian). The 
mapset in wich I wanted to use the vectors is also in lat-lon but in 
degrees:minutes:secondes. 
The map I used for digitizing contains the following information: 
Ellipsioide de Clarke 1880.
Projection conique conforme de Lambert.
My mapset PERMANENT contains the following PROJ_INFO:
name: Latitude-Longitude
proj: ll
ellps: international

Hope that someone can help me,
Moniek Vesseur.