SlideLock2, Inconsistent Device Identifier

When I run slideLock2, it throws "Inconsistent Device Identifier"

07-01 07:42:49.358: E/AndroidRuntime(432): java.lang.Error: Inconsistent Device Identifier
07-01 07:42:49.358: E/AndroidRuntime(432): at com.slideme.slidelock.License.(License.java:118)
07-01 07:42:49.358: E/AndroidRuntime(432): at com.slideme.slidelock.License.(License.java:66)
07-01 07:42:49.358: E/AndroidRuntime(432): at com.slideme.slidelock.License.(License.java:90)

The key is wrong and I'm testing it first time. To see what happens when invalid key is entered. But looks like its not working.

Edit:
The sample lock application throws same. Looks like it doesnt work in Android 1.6 to 2.1. Work in 2.2. But I want it working for 1.6.

Anyone to reply ? its been

Anyone to reply ? its been more than 3 days.

Tested on emulator, the SL2

Tested on emulator, the SL2 library works from Android 2.2.