I am trying to run selenium test cases on my site and getting a wierd firefox launching problem from past few days.

I have tried few options per selenium FAQ page, however the problem still persists.
I have tried following things

1. I have tried cleaning up the C:\DOCUME~1\fromdev\LOCALS~1\Temp directory. The directory mentioned in the java stacktrace does not really exist on my system.
2. I have also tried restarting my system, just avoid any existing processes causing this.
3. I have also tried checking the task manager on my windows machine and I dont see any firefox processes.
4. I have also tried removing existing firefox profiles and recreating them.
5. I have also tried firefox with no-addon mode, however no difference.

The exception stacktrace is as shown below.

12:06:54.218 INFO - creating new remote session
12:06:54.218 INFO - Allocated session 6461092698d344f0b9856f9152024b63 for http://www.fromdev.com, launching...
12:06:54.234 INFO - Preparing Firefox profile...
12:07:15.238 ERROR - Failed to start new browser session, shutdown browser and clear all session data
java.lang.RuntimeException: Firefox refused shutdown while preparing a profile
at org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher.wai
tForFullProfileToBeCreated(FirefoxChromeLauncher.java:371)
at org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher.pop
ulateCustomProfileDirectory(FirefoxChromeLauncher.java:120)
at org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher.lau
nch(FirefoxChromeLauncher.java:90)
at org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher.lau
nchRemoteSession(FirefoxChromeLauncher.java:416)
at org.openqa.selenium.server.browserlaunchers.FirefoxLauncher.launchRem
oteSession(FirefoxLauncher.java:118)
at org.openqa.selenium.server.BrowserSessionFactory.createNewRemoteSessi
on(BrowserSessionFactory.java:374)
at org.openqa.selenium.server.BrowserSessionFactory.getNewBrowserSession
(BrowserSessionFactory.java:125)
at org.openqa.selenium.server.BrowserSessionFactory.getNewBrowserSession
(BrowserSessionFactory.java:86)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.getNewBrowse
rSession(SeleniumDriverResourceHandler.java:809)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.doCommand(Se
leniumDriverResourceHandler.java:435)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handleComman
dRequest(SeleniumDriverResourceHandler.java:405)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handle(Selen
iumDriverResourceHandler.java:149)
at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1530)
at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1482)
at org.openqa.jetty.http.HttpServer.service(HttpServer.java:909)
at org.openqa.jetty.http.HttpConnection.service(HttpConnection.java:820)

at org.openqa.jetty.http.HttpConnection.handleNext(HttpConnection.java:9
86)
at org.openqa.jetty.http.HttpConnection.handle(HttpConnection.java:837)
at org.openqa.jetty.http.SocketListener.handleConnection(SocketListener.
java:243)
at org.openqa.jetty.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.openqa.jetty.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
Caused by: org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher$FileLockRemainedException: Lock file still present! C:\DOCUME~1\fromdev\LOCALS~1\Temp\customProfileDir6461092698d344f0b9856f9152024b63\parent.lock
at org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher.wai
tForFileLockToGoAway(FirefoxChromeLauncher.java:322)
at org.openqa.selenium.server.browserlaunchers.FirefoxChromeLauncher.wai
tForFullProfileToBeCreated(FirefoxChromeLauncher.java:369)
... 20 more
12:07:15.238 INFO - Got result: Failed to start new browser session: Error while
launching browser on session null