Silly problem with a Shell on Solaris 10

Hello to you all ....

There is something wrong with the code below and I can't pinpoint the
problem... The code seems to be looping correctly except that it "unzips"
only the first file encounterred and not the rest....

I have a table called "finmois.jdract" which contains the following a list
of tables stored within a ZIP file that looks like this :

NomFichier NoObs NomZip
CLTMAS 10000 CLTMASZ
CLMHDR 10434 CLMHDRZ
Etc.

The following piece of code simply browse within this table and proceed to
extract the ZIP name (NomZip) and launch a Unix Shell that is suppose to
redirect to a specific directory and lunch the "unzip"....

rsubmit;
data _null_;
** Let's see how many tables there is in the table "finmois.jdract"
**;
set finmois.jdract nobs = HowManyTables;
** From the first obs in "finmois.jdract" till the end, loop **;
do i = 1 to HowManyTables;
put i "/ " HowManyTables;
set finmois.jdract point = i;
** Grad the "NomZip" variable and store into a macro variable
called "QuelZip" **;
call symput("QuelZip", NomZip);
x "cd /data2/as400/download/ftpdev; unzip -j -o &QuelZip.";
if i = HowManyTables then stop;
end;
run;
endrsubmit;

I've been at this problem for a couple of days and I'm giving up...

I'm calling for the BUG-Busters of SAS-L to help me out ...

TIA, Patrice :-)