org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to
host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

When i run the selenium scripts in jenkins the fallowing error is showing:
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running TestSuite
org.openqa.selenium.firefox.NotConnectedException: Unable to connect to
host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
Error: no display specified
Error: no display specified
at
org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:106)
at
org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:244)
at
org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:110)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:188)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:183)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:179)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:92)
at
com.ebates.fe.web.integration.howitworks.test.HowItWorksPageTest.setUp(HowItWorksPageTest.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:525)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:202)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:130)
at
org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:173)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:105)
at org.testng.TestRunner.runWorkers(TestRunner.java:1178)
at org.testng.TestRunner.privateRun(TestRunner.java:757)
at org.testng.TestRunner.run(TestRunner.java:608)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1158)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1083)
at org.testng.TestNG.run(TestNG.java:999)
at
org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:62)
at
org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:141)
at org.apache.maven.surefire.Surefire.run(Surefire.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:350)
at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1021)
Tests run: 15, Failures: 1, Errors: 0, Skipped: 14, Time elapsed: 46.101
sec <<< FAILURE!
I am using selenium server version 2.35.0, and firefox version is 23 and
OS is linux. i am running the scripts in jenkins.