On (2,3,7)-generation of maximal parabolic subgroups

Let R be a ring with 1 and E-n(R) be the subgroup of GL(n)(R) generated by the matrices I + re(ij), r is an element of R, i not equal j. We prove that the subgroup Pn,((n) over bar) of En+(n) over bar(R) consisting of the mat rices of shape ((A)(B)(O)((A) over bar)), where A is an element of E-n(R), (A) over bar is an element of E-(n) over bar(R) and B is an element of Mat( n,(n) over bar)(R), is (2, 3, 7)-generated whenever R is finitely generated and n,(n) over bar are large enough.