Bluetooth sockets seem dodgy

[reg.orton]

Hi Guys,
I'm having a problem where I am connecting my phone via BT to an external device. If I power down my phone, and then run the script it works perfectly however when I try to run the script again I get an error:

address,services = socket.bt_discover()
error: (13, 'Permission Denied')

This happens when the discovery starts on the mobile. Closing the python shell does not help, neither does turning off and on the bluetooth module.

It happens when the script gracefully closes as well as when it crashes.

Any ideas????

Below is the relevant code:

import appuifw
import e32
import socket

def bt_connect():
    print "starting to connect"
    global sock
    sock=socket.socket(socket.AF_BT,socket.SOCK_STREAM)
    target=''
    if not target:
        address,services=socket.bt_discover()
        print "Discovered: %s, %s"%(address,services)
        if len(services)>1:
            import appuifw
            choices=services.keys()
            choices.sort()
            choice=appuifw.popup_menu([unicode(services[x])+": "+x
                                        for x in choices],u'Choose port:')
            target=(address,services[choices[choice]])
        else:
            target=(address,services.values()[0])
    print "Connecting to "+str(target)
    sock.connect(target)
    print "OK."

		
def bt_send_data(string): #send data to BT module. sends raw strings. 
	global sock
	sock.send(string)
	#print string

def bt_receive_data(): #return from bt.
    global sock
    i = 0
    buffer = [] 
    while(i <= 60):
         data = sock.recv(1)
         print str(ord(data))
         buffer.append(data)
         i = i + 1
    return buffer

bt_connect() # connect to bt module. 

def bt_close(): #close the bt sock when exiting
	global sock
	sock.close()
	print "BTconnection closed"

def format_bt(type,number):
	number_string = str.zfill(str(number),4)
	type = type[0]
	output = type + number_string
	return output

def send_bt(type, number):
	stringtosend = format_bt(type, number)
	bt_send_data(stringtosend)


def stop_controller():
	send_bt('S',1)

def flush_controller():
	send_bt('S',2)

initialise_controller()		

	
def exit_key_handler():
	bt_close()
	app_lock.signal()

def singleshot(): 
	send_bt("C",1)


# create an Active Object
app_lock = e32.Ao_lock()
# create the tabs with its names in unicode as a list, include the tab handler
appuifw.app.set_tabs([u"Single Shot", u"Fast Shot", u"Intervalometer", u"Pano",u"Config"],handle_tab)
# set the title of the script
appuifw.app.title = u'Canon 400D V2.011'
# set app.body to app1 (for start of script)
appuifw.app.body = app1
#exit key handler
appuifw.app.exit_key_handler = exit_key_handler

#wait for lock
app_lock.wait()