Question about Contact Reports??

[Rab09]

Could someone Please explane to me, what the rules are in reguards to making Contact Reports?? In my first patrol out of Manila, I came across a Task Force and reported same. I get an order to inflect major damage to said Task Force ( in a S-18 class boat), which is made up of 8 Shiratsuyu class destroyers, 1 Mogami class heavy cruiser, 1 Furutaka heavy cruiser, 2 Kongo class battleships and last but not least 1 Small Old Tanker.. Ok, managed to get into fireing range (abit long 2800yds) but with there speed at 11kts and me submerged, I sent 3 fish at last cruiser in line (Mogami) and 1 at the Tanker. I went very deep and moved away from them. All fish missed ( still learning how to set fish for proper depth ) I got away surfaced and took off after them. Many hours later with out chargeing batteries (need that 1kt gain in speed) I again made contact, but they have changed course. I try to make another Contact Report to give the new course and speed but NOTHING wont let me. Is there a time limit?? or ???

I Would also like to say Thank You to ALL who post on SubSims forums for SHIV and SHIII, for many, many, many hours of GREAT reading and Education, I have recieved over the years..
I also was wondering if other ppl have trouble coming to these forums, to just check on 1 thing and then go and continue your patrol. But you don't as you spent your play time READING instead!! And of course the next day you do the same thing, and so on