Can I start different background tasks depending on if-statement?

Hello.

I have a system which can operate in two different systems: automatic and manual mode.

My goal is to start different background tasks depending on the chosen mode. I can chose the mode with radio buttons and set a global variable (SamplingMethodG) to 1 for automatic or 2 for manual mode. And then with a button I want to start my system. In the function for this button I use an if-statement to check which mode is selected and start the appertaining mode. 

My problem is the the background task for the automatic is working. All functions belonging to that task are executed constantly. But if I choose the manual mode it is only executed once.

Do you have an idea why?
 

Here is the relevant code:

Function RelayInitialize(ctrlName) : ButtonControl
	String ctrlName	
	Variable defaultRM,instr,status
	String resourceName = "ASRL8::INSTR"
	
	//opens resource manager
	
	viOpenDefaultRM(defaultRM)	
	status = viOpenDefaultRM(defaultRM)
	if (status < 0)
		ReportVISAError("viOpenDefaultRM", instr, status)
	endif
	
	//opens session with instrument
	viOpen(defaultRM, resourceName, 0, 0, instr)
	
	status = viOpen(defaultRM, resourceName, 0, 0, instr)
	if (status < 0)
		viClose(defaultRM)
		ReportVISAError("viOpen", instr, status)
		print  "Could not open Relay"
		//return 0
	endif
	
	//setting attributes for relaycard
	status =visetattribute(instr,VI_ATTR_TMO_VALUE,50)							//Timeout
	status =visetattribute(instr,VI_ATTR_ASRL_BAUD,9600)							//Baudrate
	status =visetattribute(instr,VI_ATTR_ASRL_DATA_BITS,8)						//Data Bits
	status =visetattribute(instr,VI_ATTR_ASRL_PARITY,VI_ASRL_PAR_NONE)			//Parity
	status =visetattribute(instr,VI_ATTR_ASRL_STOP_BITS,VI_ASRL_STOP_ONE)		//Stop Bit
	status =visetattribute(instr,VI_ATTR_ASRL_FLOW_CNTRL,VI_ASRL_FLOW_NONE)	//Flow control for Data Transfer
	
	variable/G root:SamplerGlobals:Relaycard = instr
	Printf "Relay=%d\r", instr

	
	//Check which sampling method and start corresponding background task to control relays	
	NVAR SamplingMethodG=root:SamplerGlobals:SamplingMethodG
	
	
	if (SamplingMethodG==1)		//automatic sampling
		CtrlNamedBackground automatic,period=60,proc=AutomaticSampling,start
	elseif (SamplingMethodG==2)	//manual sampling
		ctrlNamedBackground manual,period=60,proc=ManualSampling,start
	endif
End


//Running through all samplers and initialize functions checkcondition and checkformula
function ManualSampling(s)
	STRUCT WMBackgroundStruct &s
	variable sampler
	
// to check if function is executed once or more
	print "bla"
		
End





//Activates functions to check conditions, formula and if the system should sample and time couting
function AutomaticSampling(s)
	STRUCT WMBackgroundStruct &s
	
//to check if function is executed once or more
	print "blabla"
	variable sampler,condition
	NVAR ParticleSizeG=root:SamplerGlobals:ParticleSizeG

	if (ParticleSizeG==1)		//PM1: sampler 1-4
		for(sampler=1;sampler<5;sampler+=1)
			for(condition=1;condition<5;condition+=1)
				Checkcondition(sampler,condition)
				Checkformula(sampler,condition)
				CheckSampling(sampler)				
				Timecount(sampler)
			endfor
		endfor
			
	
	elseif (ParticleSizeG==2)	//PM1+PM10: sampler 1-2
		for(sampler=1;sampler<3;sampler+=1)
			for(condition=1;condition<5;condition+=1)
				checkcondition(sampler,condition)
				Checkformula(sampler,condition)		
				CheckSampling(sampler)
				Timecount(sampler)
			endfor
		endfor
	endif
	
	return 0
End

Thank you in advance.