selenium java friefox error please help!!!

Exception in thread "main" org.openqa.selenium.WebDriverException: org.openqa.selenium.WebDriverException: Unable to bind to locking port 7054 within 45000 ms
System info: os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.8.0_31'
Driver info: driver.version: firefox
System info: os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.8.0_31'
Driver info: driver.version: firefox
at org.openqa.selenium.firefox.internal.ExtensionConnectionFactory.connectTo(ExtensionConnectionFactory.java:46)
at org.openqa.selenium.firefox.FirefoxDriver.connectTo(FirefoxDriver.java:139)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:129)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:109)
at FirstTest.main(FirstTest.java:8)
Caused by: org.openqa.selenium.WebDriverException: Unable to bind to locking port 7054 within 45000 ms
System info: os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.8.0_31'
Driver info: driver.version: firefox
at org.openqa.selenium.firefox.internal.SocketLock.lock(SocketLock.java:72)
at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.<init>(NewProfileExtensionConnection.java:45)
at org.openqa.selenium.firefox.internal.ExtensionConnectionFactory.connectTo(ExtensionConnectionFactory.java:44)
... 4 more