SparkWeb: Error while creating account

When is am trying to create the account from sparkweb.getting an error in web saying server not responding to request.

and openfire server log i am getting this error given below

2008.10.24 16:14:23 Closing session due to exception: (SOCKET, R: /122.252.231.44:3127, L: /122.252.231.44:5222, S: 0.0.0.0/0.0.0.0:5222)
org.apache.mina.filter.codec.ProtocolDecoderException: java.lang.Exception: Disallowed character (Hexdump: 3C 69 71 20 74 79 70 65 3D 22 73 65 74 22 20 69 64 3D 22 69 71 5F 31 22 20 74 6F 3D 22 31 32 32 2E 32 35 32 2E 32 33 31 2E 34 34 22 3E 3C 71 75 65 72 79 20 78 6D 6C 6E 73 3D 22 6A 61 62 62 65 72 3A 69 71 3A 72 65 67 69 73 74 65 72 22 3E 3C 75 73 65 72 6E 61 6D 65 3E 73 75 6D 65 73 68 3C 2F 75 73 65 72 6E 61 6D 65 3E 3C 70 61 73 73 77 6F 72 64 3E 74 65 73 74 31 32 33 3C 2F 70 61 73 73 77 6F 72 64 3E 3C 2F 71 75 65 72 79 3E 3C 2F 69 71 3E 00)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:170)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java :239)
at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(Execut orFilter.java:283)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.Exception: Disallowed character
at org.jivesoftware.openfire.nio.XMLLightweightParser.read(XMLLightweightParser.ja va:210)
at org.jivesoftware.openfire.nio.XMPPDecoder.doDecode(XMPPDecoder.java:32)
at org.apache.mina.filter.codec.CumulativeProtocolDecoder.decode(CumulativeProtoco lDecoder.java:133)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:163)
… 9 more

if anybody have come across this issue pls give some inputs

Thanks in advance

Sumesh