so this is part of the festive sale to buy all episodes for around £7 how ever the only chapter it downloaded and will let me play is the first one. i've paid for all 5 and i have the full game upgrade download (the small 100kb download) 
i've finished chaper 1, which was pure adventure game pleasure for me i'll admit, but now i can't get the rest  
can anyone bring some light to the situation? 

I am experiencing the exact same problem. Apparently, this is an issue for everyone who has tried to download the five games from the EU PSN recently. I have come across multiple topics on both the official PS site and the Telltale site. Fucking god, Sony. I am pissed at you.
 
 http://community.eu.playstation.com/t5/PlayStation-Store-Games/Tales-of-monkey-island-problem/td-p/12089074
 http://community.eu.playstation.com/t5/Technical-Help/Tales-of-Monkey-Island-problem/td-p/12094509/highlight/true/page/2 
 http://www.telltalegames.com/forums/showthread.php?s=7897b00b817fb991c41b53a4db69db23&t=21384&page=2