Ancientflames

I am having a similar problem and it may be my own fault because i wanted my single player world to become a server. First I was getting in and crashing right away. So I took my SSP world and converted to to 2.1.1 with the converter thing and put it in my SMP world. I can run around for about 20 seconds or so and then it crashes. I have been tinkering with different settings for a while now and i can now log in for about 20 seconds before crashing. I have tried changing the java from 7 to 6 and back and it made no difference. I messed with the Ram settings. I have tried fiddling with the actual map stuff itself to no avail. No matter what I do it will log in and pretend its working then crash after a bit. No specific thing in the game causes it to crash (at first i thought opening a chest or falling). (same settings now) launcher version - 0.5.4.6 operating system - windows 7 java version - 7 server log from when he crashed - [iNFO] Connection reset [iNFO] ancientflame lost connection: disconnect.endOfStream