P-t-P question

I am still attempting to utilize a P-t-P connection from our AS/400/iSeries
(whatever the name is) to another company.  Still does not work.  Dials the
other system, but does not get a proper connection.

What it DOES do is confuse the modem.  I have several scheduled jobs that dial
out on this modem to other organizations to trasmnit data.  When these sessions
are run, ZMODEM is used.  After my P-t-P tests, I use ENDTCPPTP command, and the
line/controller/device are varied off.  But, somehow, the modem is left hanging,
requiring it to be turned off and back on.  Obviously, P-t-P over async modem is
not a good thing if it leaves the modem useless for other data transfer jobs.  I
am wondering if anybody has any suggestions as to how to get this configuration
to leave the modem is a proper state for the next use?

Also, I copied the modem script from QUSRSYS/QATOCPPSCR (member Dial400) to our
modifications library.  I edited it according to instructions in SF62386.  The
thing I found out was that I had initially placed the member into the incorrect
source physical file.  I copied it to the proper location with no problem.  But,
when I tried to remove it from the wrong location, the remove failed.  There was
a lock held on the member, even after ENDTCPPTP and devices were varied off. 
The lock persisted until the next IPL.  Has anybody run into this, and, if so,
were you able to get the lock removed without an IPL?

We are on v5r4.  I have no idea what cum level, as that is handled by the system
administrator.  Potentially, this is an issue that has been addressed by a cum. 
If I knew that, I could relay to the system administrator.


Thanks for all assistance.

John McKee