I believed the problem is the TV mode. (NTSC or PAL mode)

try this
turn mic OFF
press and hold 8 then press power buton (PAL to NTSC)
or
turn mic OFF
press ang hold 9 then press power button (PAL to NTSC)

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This is from joeunenterprises.com
Method 1:
Press and hold down the number zero (0) button when the unit is in off status, and then press the red button (power button.) After you push and release the red button, release the zero (0) button in about 1 to 2 seconds later.
Method 2:
Press and hold down the number eight (8) button the the unit is in off status, and then press the red button (power button.) After you push and release the red button, release the number eight (8) button in about 1 to 2 seconds later.
Method 3:
Press and hold down the number two (2) button the the unit is in off status, and then press the red button (power button.) After you push and release the red button, release the number two (2) button in about 1 to 2 seconds later.
When the TV screen is scrolling up & down rapidly with black, white
color: Try method 1
To reset the unit: Try method 1
When there is no picture coming out from the TV screen: Try method 2, and then try method 1
When there is static while trying to use the sub. microphone: Try method 1, and then try method 3
When there is no volume on either the main microphone or the sub
microphone: Try method 1 for the main microphone, and try method 1&3 for the sub microphone
For customers who tried those methods and had your microphone back to normal, thank you very much for your listening. For customers who tried those methods but still are having difficulties, please contact us at 1-866-85-JOEUN (855-6386.)

--------------------------------------------------------------------------------Method 1:
Press and hold down the number zero (0) button when the unit is in off status, and then press the red button (power button.) After you push and release the red button, release the zero (0) button in about 1 to 2 seconds later.
Method 2:
Press and hold down the number eight (8) button the the unit is in off status, and then press the red button (power button.) After you push and release the red button, release the number eight (8) button in about 1 to 2 seconds later.
Method 3:
Press and hold down the number two (2) button the the unit is in off status, and then press the red button (power button.) After you push and release the red button, release the number two (2) button in about 1 to 2 seconds later.
When the TV screen is scrolling up & down rapidly with black, white
color: Try method 1
To reset the unit: Try method 1
When there is no picture coming out from the TV screen: Try method 2, and then try method 1
When there is static while trying to use the sub. microphone: Try method 1, and then try method 3
When there is no volume on either the main microphone or the sub
microphone: Try method 1 for the main microphone, and try method 1&3 for the sub microphone
For customers who tried those methods and had your microphone back to normal, thank you very much for your listening. For customers who tried those methods but still are having difficulties, please contact us at 1-866-85-JOEUN (855-6386.)

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This is with regards to the multi system capability of your TV. You might bought a NTSC mic but your TV is only PAL.