I have a problem with ControlSend

[Harmonful]

I have this script

HotKeySet ( "{+}", "mana" )

While 1
    Sleep (1000)
WEnd

Func mana ()
    While 1
        ControlSend("Tibia", "", "", "{F7}")
        Sleep (1500)
    WEnd
    EndFunc

The problem is

When a use the script

30 min later

i cant write anithing

for example

I write "D"

to "¬"

Plx help