Problem with Plugging in Compact Flash Card

Question

I am having a problem now when I plug my compact flash card in to download pictures.  When I plug the card in, the AutoPlay window pops up, as it always does.  However, I also get another window that pops up and says "Lightroom must quit because catalog named Lightroom Catalog.lrcat is not writeable and cannot be opened.   This could be caused by incorrect permissions or because another Lightroom application is using the catalog.  You may select a different catalog the next time you run Lightroom  by holding down the control key while Lightroom launches."
This problem started yesterday.  I had just upgraded to LR 3.5 the day before the problem started.
Couple of other things:
1.  Lightroom was not launched at the time I plug in the card and this problem has occurred.   In fact, I just restarted my system a shortwhile ago to test this problem, and it happened again.
2.  My Lightroom catalog is actually called Lightroom 3 Catalog.lrcat, not Lightroom Catalog.lrcat.
3.  I have never had my system set up to automatically launch Lightroom when my card is plugged in.
4.  I have not actually downloaded any pictures from a card for about 2 weeks before I did yesterday, so I cannot say for certain whether or not LR 3.5 is the cause of the problem and perhaps something else is.  But the fact is that I did upgrade to LR 3.5 a few days ago.
5.  Once I close both the AutoPlay window and the LR dialogue window, I can launch LR 3.5 with no problem and import pictures as I normally do.

Answer 1

Your description of what you've done and the code you show does not match what the tutorial says to do and what code to use... (there is no stopAndGoTo() function in Flash).
Right-click the second frame on the upper layer labeled Actions and select Actions. Copy and paste the code below to make our preloader functional.
if (_root.getBytesTotal() != _root.getBytesLoaded()){
gotoAndPlay(1);
bar_mc._xscale=(_root.getBytesLoaded()/_root.getBytesTotal())*100;
loader_txt.text=Math.round((_root.getBytesLoaded()/_root.getBytesTotal())*100)+"%";