OP277 hmi, cannot activate screens when tag value is equal to 8

Good day everyone,

I encountered a weird problem on my OP277 project. I replaced the existing OP27 to OP277, retaining their S7 plc. The problem is I cannot browse the other screens after changing from the MAIN screen to other screen. I have observed that my value on my screen number tag is "8" but when i chnged it to other value i cannot browse the screen anymore.

MAIN screen value - 8

Pump screen - 6

Automatic screen - 2

I already traced the area pointer dbw440 (screen number dbb443).

i really need some help here. Please.

Thanks everyone.

Daniel