Rumba / Windows 10 64 / Marlin

I installed Marlin 1.1 RC5 (bugfix) on my Rumba board, via Arduino IDE. with no issues
Im running Windows 10 64

I installed simlify3d but i cannot connect to the rumba
Ive tried different ports, USB Ports, USB Cables, Drivers
sleep disables on USB Hubs/controllers
two different computers..also tried with Pronterface.. cant connect to control
Baud is set to 115200
com 3

it shows up proplerly in windows device manager
but why cant i connect to control this thing.

---

Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

Unless you changed it, Marlin defaults to 250000 for the serial comport speed.

yes i changed it to 115200

---

Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.

I loaded up repetier and can control it no issue. when i try Marlin 1.1 RC3, RC4 or RC5 Bugfix
i cant connect unless I turn off start up code in simplify3d but then it wont respond to gcode
also when I try to connect with S3D i notice that the rumba resets.

---

Makerparts.ca
Your Canadian source for V-Slot Extrusion, CNC and 3D Printing Parts and Accessories.
we are proud to be an official Openbuilds distributor.