Error in Openfire , it work for one day fine then i am getting these errors . help me please

Hi , I started using Openfire , i created serveer and then connected it with host , using spark , all work weel for 1 one day afterwards in the openfire window where we get options like , start , stop , launch admin . when i launch admin the admin page dont open says connection problem (internet working fine) this is the error log i see in the window where all tabs are present . Can any one plese tell me what does this mean as i am not from computer background . i need to know the solution for this . can any one help me please. in the end i have also pasted the error log file which is stored in bin. Help me please

log4j:ERROR setFile(null,true) call failed.

java.io.FileNotFoundException: C:\Program Files\Openfire\bin\..\logs\debug.log (Access is denied)

at java.io.FileOutputStream.openAppend(Native Method)

at java.io.FileOutputStream.<init>(Unknown Source)

at org.apache.log4j.FileAppender.setFile(FileAppender.java:290)

at org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:194)

at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:164)

at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:257)

at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:285)

at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:17 1)

at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.ja va:184)

at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurat or.java:502)

at org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:471)

at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:921)

at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:790)

at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:696)

at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.jav a:471)

at org.apache.log4j.LogManager.<clinit>(LogManager.java:125)

at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73)

at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:243)

at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:255)

at org.jivesoftware.openfire.XMPPServer.<clinit>(XMPPServer.java:148)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:113)

at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:58)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)

at com.exe4j.runtime.WinLauncher.main(Unknown Source)

log4j:ERROR setFile(null,true) call failed.

java.io.FileNotFoundException: C:\Program Files\Openfire\bin\..\logs\info.log (Access is denied)