tail problem on evolution 180

[anyw]

wonder if i can pick your brains please, i have a century evolution 180, because the run up to xmas was rather manic for me it stayed in the box for about 4 weeks(indoors) with out being flown(well crashed) after approximately 4 weeks went flying indoors indoors, got her out and up she went lovely just like i left her, anyway after a few minutes the tail started to wag badly then she started to spin out of control so put her down, tried a few times that night but the tail was out of control. next day got a new tail motor and fitted it, and exactly the same thing happened flies lovely for a few minutes then tail wags badly.
anybody got any idea's why this is happening and remedies, also would the lay off effected it like this.

[heliboy]

Check the battery?

Are you running the battery to nearly flat..or do you time your flights?

sounds like the battery is running out of juice.

[horsham rc]

the printed board . gyro?? take it back to the shop mate

[anyw]

Check the battery?

Are you running the battery to nearly flat..or do you time your flights?

sounds like the battery is running out of juice.

the printed board . gyro?? take it back to the shop mate

will double check the battery, i am sure it is more then 1 of the batteries but will check them out later to make sure.

the heli is not new it is well used , so can't take it back to the shop other then for advice