L1, L2 Visa

Appreciate the efforts of all the contributes in this forum, this helps. I had a L1B interview this week.
Here is the conversation between self and VO, Please advice what could have lead to denial
 

Me : Good morning with smile.

VO : Good Morning, Documents please, L1A or B.
Me : It is for L1B.
 
VO: Have you visited US before ?
Me : No ???
 
VO: Which company are you working in?
Me : xyz

VO: How many years are you working in xyz?
Me : 16 years

VO : Who is going to be your Client ?
Me : abc
 
VO : How long are you working for this client abc?
Me: 6 years

VO : what will be your salary?
me : ???K$ per annum

VO: Which City will you be working?
Me : DEF city

VO :Why did they choose you?
Me : explained the tool that i developed and the niche why me(VO was typing as i was talking)

VO :Is this going to be used for only this client?
Yes
 
VO took out a blue slip, rounded the point “Not clearly approvable under Section 8 CFR 214.2 (I)(ii)(B),(C), or (D), or INA 101(a) (15)(L)”. Stamped “Not clearly approvable”

VO : Sorry your application is not clearly approvable. Please speak with your HR.
me : thanks