Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D and any amendments to it with respect to the 133,647,102 Ordinary Shares, par value $0.002 per share, of AEI, and further agree that this Joint Filing Agreement be included as an Exhibit to those joint filings.

[Signature Page Follows]

In witness whereof, the undersigned hereby execute this Amendment this 23rd day of October, 2009.

ASHMORE GROUP PLC

By: /s/ Craig Webster

Name: Craig Webster

Title: Authorized Signatory

ASHMORE INVESTMENT MANAGEMENT LIMITED

By: /s/ Craig Webster

Name: Craig Webster

Title: Authorized Signatory

ASHMORE INVESTMENTS (UK) LIMITED

By: /s/ Craig Webster

Name: Craig Webster

Title: Authorized Signatory

ASHMORE MANAGEMENT COMPANY LIMITED

By: /s/ Victor Holmes

Name: Victor Holmes

Title: Director

ASHMORE GLOBAL SPECIAL SITUATIONS FUND
2 LIMITED

By: Northern Trust (Guernsey) Limited as custodian for
and on behalf of Ashmore Global Special Situations
Fund 2 Limited

By: /s/ Lucy Wallace /s/ Sarah Brouard

ASHMORE INVESTMENT MANAGEMENT LTD SC 13D