Have a problem when create folder

Hi experts,
I'm having a problem in creating a folder.  It failed create a folder.  I have tried with two folder:
A) C:/apache-tomcat-6.0.18/webapps/grid50/grid_archive
B) C:/apache-tomcat-6.0.18/webapps/grid50/grid_archive/ram/0

For create (A) folder it's doesn't have a problem.  But when I create (B) folder it's failed. Below is the code.

public String createTempDir2(int module, int mid) throws Exception{
		boolean bGotFolder = true;
		String tempPath = null;
		String tempdir = null;
		
		try{
			
			tempdir = System.getProperty("archive_path");			
			
			if(module == 1)
			{
				tempPath = tempdir+"/erm"+"/"+mid;
			}
			else if(module == 2 )
			{
				tempPath = tempdir+"/ram"+"/"+mid;			 
			}		
			
		    if(log.isDebugEnabled())
		    	log.debug("Default temp file path = " + tempPath);
		    
		    File folderExisting = new File(tempPath);
		    
			if (!folderExisting.isDirectory() || !folderExisting.exists())
			{
				if(!folderExisting.mkdir())
				{
			    	if(!folderExisting.isDirectory())
			    	{	    		
			    		
			    		if(log.isDebugEnabled())
			    			log.debug("Failed to create temp because a file with same name exists. ");
			    		
			    		if(folderExisting.delete())
			    		{
				    		if(!folderExisting.mkdir())
				    		{
								bGotFolder = false;
								
								if(log.isDebugEnabled())
									log.debug("Failed to create temp");
				    		}
				    		else
				    		{
				    			if(log.isDebugEnabled())
									log.debug("Created new dir after deleting file, name = " + folderExisting.getPath());				    			
				    		}
			    		}
			    		else
			    		{
							bGotFolder = false;
							
				    		if(log.isDebugEnabled())
				    			log.debug("Failed to delete the file.");			    			
			    		}
			    	}
			    	else
			    	{
						bGotFolder = false;
						
			    		if(log.isDebugEnabled())
			    			log.debug("Failed to create temp folder.");
			    	}
				}
				else
				{
				    if(log.isDebugEnabled())
				    	log.debug("Created new dir, name = " + folderExisting.getPath());					
				}		
				
			}			
								
		}
		catch(Exception e)
		{
		    log.error("function = createTempDir2(); desc = "+e);		    
		}

		return tempPath;
	}

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