Probleme minecraft

Bonjour, quand je met le jeux sa m'affiche ça

--- BEGIN ERROR REPORT e310794c --------
Full report at:
C:\Documents and Settings\Ryan\Application Data\.minecraft\crash-reports\crash-2013-04-14_17.55.12-server.txt
Please show that file to Mojang, NOT just this screen!

Generated 14/04/13 17:55

-- System Details --
Details:
Minecraft Version: 1.5.1
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_17, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 371062576 bytes (353 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 5417 (303352 bytes; 0 MB) allocated, 2180 (122080 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 2, tcache: 0, allocated: 1, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1524 (85344 bytes; 0 MB) allocated, 1029 (57624 bytes; 0 MB) used
Player Count: 1 / 8; [jc['ryan'/155, l='premier monde', x=145,50, y=67,00, z=247,50]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Unknown Source)
at akv.<init>(SourceFile:17)
at akv.<clinit>(SourceFile:6)
at acj.a(SourceFile:108)
at acj.a(SourceFile:90)
at iy.b(SourceFile:152)
at iy.a(SourceFile:179)
at iz.a(SourceFile:623)
at net.minecraft.server.MinecraftServer.a(SourceFile:256)
at net.minecraft.server.MinecraftServer.q(SourceFile:402)
at bjh.q(SourceFile:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:331)
at gp.run(SourceFile:573)
--- END ERROR REPORT dfe802ec ----------

j'espère que vous pourriez m'aider .