server not responding to LL_ENC_REQ

[RMatthew]

I have ported the keyboard example code and integrated it with another set of services. However I don't see the device responding to an LL_ENC_REQ. I'm not sure what I can check to see if my configuration is off or not. I am using an S110 soft device and the corresponding keyboard example code, I've been trying to solve this problem for quite a while but am not making any headway. What are the configuration settings that affect this.

thanks

[RMatthew]

The example above was trying to connect with a windows 10 machine I was previously bonded with.

I have more details, looking at wireshark and connecting with nRF connect on my iphone I get these messages in the master/slave dialog:

after master sent: Sent Find Information Request, Handles: 0x0015..0x0015

slave responded with: Rcvd Error Response - Insufficient Authentication, Handle: 0x0017 (Unknown)

master sent: Control Opcode: LL_ENC_REQ

for once I saw slave respond : LL_ENC_RESP 

slave then sent: Control Opcode: LL_REJECT_IND

any help would be appreciated

thanks

[Kenneth]

What SDK is this?

Kenneth

[RMatthew]

www.nordicsemi.com/.../nRF51-DK

[Kenneth]

Is it nRF51 SDK v7,v8, v9, v10...

Best regards,
Kenneth

[RMatthew]

I'm not sure, I'm using a code base brought down from a git repository but the examples Abstract file shows this:

/nRF_Examples/8.1.0/